To determine the constant of proportionality (k) in the ratio \( \frac{y}{x} \), you need to look at specific points on the graph. The constant of proportionality can be calculated using the formula:
\[ k = \frac{y}{x} \]
If you have specific points (x, y) on the graph, you can substitute the values into the formula to find k.
For example, if a point on the graph is (2, 6), then:
\[ k = \frac{6}{2} = 3 \]
This means that the constant of proportionality is 3.
If you can provide specific values or data points from the graph, I can help you determine the exact constant of proportionality!